CAJ | 학술논문

碳纳米管是一种具有独特结构和优异性能的新型纳米材料.文章利用碳纳米管对水溶液中的4-氯酚和2,4-二氯酚进行了吸附研究,考察了吸附时间、pH值、温度等对吸附效果的影响,并采用Langmuir和Freundlich方程进行拟合,探讨了其可能的吸附机理.研究结果表明,碳纳米管对4-氯酚和2,4-二氯酚的最佳吸附酸度在pH=2～6.碳纳米管对2,4-二氯酚吸附量大于对40-氯酚的吸附量,二者动力学特征均符合准二级动力学方程.研究了4-氯酚和2,4-二氯酚在碳纳米管上的吸附等温线.研究结果表明:4-氯酚和2,4-二氯酚在碳纳米管上的吸附量随着温度的升高而下降.吸附过程是-个放热的过程,Langmuir和Freundlich等温吸附方程均能较好地拟合吸附等温线.碳纳米管能较好地用于除去水溶液中的4-氯酚和2,4-二氯酚.
탄납미관시일충구유독특결구화우이성능적신형납미재료.문장이용탄납미관대수용액중적4-록분화2,4-이록분진행료흡부연구,고찰료흡부시간、pH치、온도등대흡부효과적영향,병채용Langmuir화Freundlich방정진행의합,탐토료기가능적흡부궤리.연구결과표명,탄납미관대4-록분화2,4-이록분적최가흡부산도재pH=2～6.탄납미관대2,4-이록분흡부량대우대40-록분적흡부량,이자동역학특정균부합준이급동역학방정.연구료4-록분화2,4-이록분재탄납미관상적흡부등온선.연구결과표명:4-록분화2,4-이록분재탄납미관상적흡부량수착온도적승고이하강.흡부과정시-개방열적과정,Langmuir화Freundlich등온흡부방정균능교호지의합흡부등온선.탄납미관능교호지용우제거수용액중적4-록분화2,4-이록분.
Carbon nanombe as a new kind of nanomaterial has a unique structure and excellent properties. The adsorption of p-chlorophenol and 2, 4-dichlorophenol from aqueous solution onto carbon nanotubes was studied. The effect of adsorption time, pH and temperature on the adsorption efficiency was investigated. Experimental results were fit with Langmuir and Freundlich equations. Mechanism of adsorption was discussed. Results showed that the adsorption of p-chlorophenol and 2, 4-dichlorophenol onto carbon nanotubes had a maximum at pH 2-6. Adsorption of 2, 4-dichlorophenol onto carbon nanotubes was more than adsorption of p-chlorophenol,both of which fit with pseudo-second order rate equation. The adsorption isotherms of p-chlorophenol and 2, 4-dichlorophenol onto carbon nanotubes were studied. Results indicated that the adsorption of p-chlorophenol and 2, 4-dichlorophenol on carbon nanotubes decreased with the increase in temperature. The adsorptions were exothermic process and all the isothermal data fit well to Langmuir and Freundlich equations. Carbon nanotubes can be used to remove p-chlorophenol and 2, 4-dichlorophenol from aqueous solution.